1. Warm Up
Look up and explain why some people in the picture to the right feel both P and S waves and why others only experience one type of wave.

2. Daily Objective
SWBAT explain how the release of energy of various types of earthquakes relates to magnitude, and P and S waves.
Fix this slide show

3. P WAVES
P waves (primary waves) are compression waves. They push (compress) and pull (expand) in the direction that the wave is traveling.
These move really fast! They arrive first, but cause the least damage.

4. P-Wave Demonstration
BUY A SLINKY

5. S WAVES
S waves (secondary waves) move in right angles and are slower than P waves. They arrive second, and cause a moderate amount of damage.

6. S Wave Demonstration
BUY ROPE

7. SURFACE WAVES Travel along the earth’s surface.
Love waves move side to side. (Bottom left picture.)
Raleigh waves move up, down, and around. (Bottom right picture.)

8. Surface vs Body Wave comparison
Which causes more damage? Explain.
Which wave moves slower?

9. WHAT THIS LOOKS LIKE IN REAL LIFE
Surface Wave
P-Wave
S-Wave
Draw the diagram in your notes.

10. S-P Time Method
Method used to determine the location of the epicenter of an Earthquake.
3 seismograph readings are needed to determine the epicenters location.

11. HOW SCIENTISTS USE THIS
SCENARIO 1: A P Wave arrives at the seismograph station 3 minutes after an earthquake. An S Wave arrives 8 minutes after an earthquake. What is the difference in arrival time?
Answer 1 ___________________
SCENARIO 2: At 10:32 a P Wave arrives. At 10:45 and S Wave arrives. What is the difference in arrival time?
Answer 2 _______________________

12. P Wave = _____________________ S Wave = _____________________
3:00 3:02 3:04 3: :08 3:10 3:12 3:14 3:16
SCENARIO 3:
P Wave = _____________________
S Wave = _____________________
Answer = ______________________

13. SCENARIO 4:
P Wave = _____________________
S Wave = _____________________

14. SCENARIO #5
Determine the difference in the travel-times between the first P wave and the first S wave, if the seismic station is 1000 kilometers from the epicenter.
Read the problem and box in key words.
Identify the information on the axis.
Plot your points to find data. ________________________
Subtract your data.
__________ - __________ = _________

15. SCENARIO #6
Determine the difference in the travel-times between the first P wave and the first S wave, if the seismic station is 500 miles from the epicenter.
Read the problem and box in key words.
Identify the information on the axis.
Plot your points to find data. ________________________
Subtract your data.
__________ - __________ = _________

16. SCENARIO #7
Determine the difference in the travel-times between the first P wave and the first S wave, if the seismic station is 2,000 miles from the epicenter.
Read the problem and box in key words.
Identify the information on the axis.
Plot your points to find data. ________________________
Subtract your data.
__________ - __________ = _________

17. SCENARIO #8
According to Figure 8-1, what is the distance between the seismic station and an earthquake epicenter, if the first S wave arrives 6.5 minutes after the first P wave?
Read the problem and box in key words.
Count the intervals between the lines.
When you have found one close to your boxed in words, plot your points to find data.
Subtract your data.
__________ - __________ = _________

18. SCENARIO #9
According to Figure 8-1, what is the distance between the seismic station and an earthquake epicenter, if the first S wave arrives 2.0 minutes after the first P wave?
Read the problem and box in key words.
Count the intervals between the lines.
When you have found one close to your boxed in words, plot your points to find data.
Subtract your data.
__________ - __________ = _________

19. SCENARIO #10
According to Figure 8-1, what is the distance between the seismic station and an earthquake epicenter, if the first S wave arrives 4.0 minutes after the first P wave?
Read the problem and box in key words.
Count the intervals between the lines.
When you have found one close to your boxed in words, plot your points to find data.
Subtract your data.
__________ - __________ = _________

20. What type of destruction occurs from Earthquakes?

21. What are tsunamis? Tsunamis:
An underwater wave caused by an earthquake or underwater landslide triggered by vibrations

22. Where do Tsunamis occur?
Convergent boundaries (reverse faults)

23. Tsunami Destruction in Japan Before After

24. FAST FACT
The largest recorded earthquake in the world was a magnitude 9.5 (Mw) in Chile on May 22, 1960

25. Haiti Article Read Article
Answer questions and reference to the paragraph your answer was found.

26. Haiti Article Part II Discuss and share answer with partner.
If there is a discrepancy in your answers, reference back to where you found the answer and try to reach an agreement.

27. Haiti Article Part III
When called on to answer a question, first share where you found the answer and then share what you determined the answer to be.

28. Landslides: How do they occur?
Lack of vegetation and increased saturation loosens the soil, resulting in a mass movement downhill